VST instrument (VSTi) + stand-alone player
Simple additive monophonic synthesiser, based on two oscillators, a noise generator, volume and pitch ADSR envelopes and some basic filtering.
An exporter can convert Renoise songs to .h (C include files) that can be used in the stand-alone player, for intros, demos, games or anything that comes to mind.
For more information --specially tricky technical things-- go to the highly detailed sorollet project page.
C++ (g++), python, Netbeans, Renoise.